[1] Jena Univ Hosp, Dept Anesthesiol & Intens Care, Jena, Germany
[2] Univ Hosp, Rotterdam, Netherlands
[3] Brandenburg Med Sch Theodor Fontane, Neuruppin, Germany
[4] Witten Herdecke Univ, Fac Hlth, Sch Med, Witten, Germany
[5] Paracelsus Med Univ, WHO Collaborating Ctr Nursing Res & Educ, Inst Nursing Sci & Practice, Salzburg, Austria
[6] Univ North Florida, Brooks Coll Hlth, Jacksonville, FL USA
[7] Hop Bicetre, Grp Hosp Paris Sud, Dept Anesthesie Reanimat, Le Kremlin Bicetre, France
[8] SOS Reg Anaesthesia SOS RA Serv, Le Kremlin Bicetre, France
[9] Neil Betteridge Associates, London, England
[10] Sapienza Univ Rome Polo Pontino, Dept Med & Surg Sci & Biotechnol, Unit Anaesthesia Intens Care & Pain Med, Latina, Italy
[11] Gen Univ Hosp, Anesthesia Crit Care & Pain Management Dept, Valencia, Spain
[12] Royal Surrey Cty Hosp, Dept Anaesthesia, Guildford, Surrey, England
[13] Univ Surrey, Fac Hlth & Med Sci, Guildford, Surrey, England
[14] Hop Raymond Poincar, Dept Anesthesiol & Crit Care, Garches, France
[15] Helsinki Univ Hosp, Dept Anaesthesiol Intens Care & Pain Med, Pain Clin, Helsinki, Finland
[16] Univ Helsinki, Helsinki, Finland
[17] Rigshosp, Sect Surg Pathophysiol, Copenhagen, Denmark
[18] Univ Leuven, Leuven Ctr Algol Pain Management, Leuven, Belgium
[19] Univ Autonoma Barcelona, Hosp Mar Esperanza, Dept Anesthesiol, Barcelona, Spain
[20] Naples Anesthesia & Pain Associates, Naples, FL USA
[21] Charit Univ, Berlin, Germany